Q JEE MAIN 2026

For a general redox reactionAnode: $\quad \operatorname{Red}_1 \rightarrow \mathrm{O}_1^{\mathrm{n}_1^{+}}+\mathrm{n}_1 \mathrm{e}^{-}$,Cathode: $\mathrm{O} x_2+\mathrm{n}_2 \mathrm{e}^{-} \rightarrow \operatorname{Red}_2^{\mathrm{n}_2-}$,Which of the following statement is...

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Q JEE MAIN_2026

Given at 298 K : $$ \begin{aligned} & \mathrm{E}_{\mathrm{Fe}^{2+} / \mathrm{Fe}}^{!}=\mathrm{X} \text { Volt } \\ & \mathrm{E}_{\mathrm{Fe}^{3+} / \mathrm{Fe}}^{!}=\mathrm{Y}...

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Q JEE MAIN_2026

At 298 K , the molar conductivity of $x \%(\mathrm{w} / \mathrm{w}) \mathrm{MX}$ solution (aqueous) is $123.5 \mathrm{Scm}^2 \mathrm{~mol}^{-1}$. The...

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Q JEE MAIN_2026

One half cell in a voltaic cell is constructed by dipping silver rod in $\mathrm{AgNO}_3$ solution of unknown concentration, other...

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Q JEE MAIN_2026

An electrochemical cell, consist of the following two redox couples, $\mathrm{M}^{x+}(\mathrm{aq}) / \mathrm{M}(\mathrm{s})\left[\mathrm{E}_{\text {red }}^{\ominus}=+0.15 \mathrm{~V}\right]$ and $...

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Q JEE MAIN_2026

Consider the following two half-cell reactions along with the standard reduction potential given : $$ \begin{array}{ll} \mathrm{CO}_2+6 \mathrm{H}^{+}+6 \mathrm{e}^{-} \rightarrow...

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Q JEE MAIN_2026_

A volume of $x \mathrm{~mL}$ of $5 \mathrm{M} \mathrm{NaHCO}_3$ solution was mixed with 10 mL of $2 \mathrm{MH}_2 \mathrm{CO}_3$ solution...

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Q JEE MAIN 2026

200 cc of $x \times 10^{-3} \mathrm{M}$ potassium dichromate is required to oxidise 750 cc of 0.6 M Mohr's salt...

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Q JEE MAIN 2026

Consider the following redox reaction taking place in acidic medium $$ \mathrm{BH}_4^{-}(a q)+\mathrm{ClO}_3^{-}(a q) \longrightarrow \mathrm{H}_2 \mathrm{BO}_3^{-}(a q)+\mathrm{Cl}^{-}(a q) $$...

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Q JEE MAIN_2026_

For strong electrolyte $\Lambda_m$ increases slowly with dilution and can be represented by the equation $$ \Lambda_{\mathrm{m}}=\Lambda_{\mathrm{m}}^{\cdot}-A c^{1 / 2}...

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Q JEE MAIN 2026

Electricity is passed through an acidic solution of $\mathrm{Cu}^{2+}$ till all the $\mathrm{Cu}^{2+}$ was exhausted, leading to the deposition of...

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Q JEE MAIN 2026

Consider the above electrochemical cell where a metal electrode ( $M$ ) is undergoing redox reaction by forming $...

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Q JEE MAIN 2026

MX is a sparingly soluble salt that follows the given solubility equilibrium at 298 K . $...

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Q JEE MAIN 2026

In the given electrochemical cell, $\mathrm{Ag}(\mathrm{s})|\mathrm{AgCl}(\mathrm{s})| \mathrm{FeCl}_2(\mathrm{aq}), \mathrm{FeCl}_3(\mathrm{aq}) \mid \mathrm{Pt}(\mathrm{s})$ at 298 K , the cell potential $\left(\mathrm{E}_{\text {cell }}\right)$...

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Q JEE MAIN 2026

For a closed circuit Daniell cell, which of the following plots is the accurate one at a given temperature?

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Q JEE MAIN 2026

Consider the following electrochemical cellin $$ \mathrm{Pt}\left|\mathrm{O}_2(\mathrm{~g})(\mathrm{lbar})\right| \mathrm{HCl}(\mathrm{aq}) \| \mathrm{M}^{2+}(\mathrm{aq}, 1.0 \mathrm{M}) \mid \mathrm{M}(\mathrm{~s}) $$ The pH above which, oxygen...

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Q JEE MAIN 2026

Consider the following electrochemical cell at 298 K $\mathrm{Pt}\left|\mathrm{HSnO}_2^{-}(\mathrm{aq})\right| \mathrm{Sn}(\mathrm{OH})_6{ }^{2-}(\mathrm{aq})\left|\mathrm{OH}^{-}(\mathrm{aq})\right| \mathrm{Bi}_2 \mathrm{O}_3(\mathrm{~s}) \mid \mathrm{Bi}(\mathrm{s})$. If the reaction quotient at...

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Q JEE MAIN 2026

Identify the correct statements : A. Hydrated salts can be used as primary standard. B. Primary standard should not undergo...

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Q JEE MAIN 2026

Correct statements regarding Arrhenius equation among the following are. A. Factor $e^{-E a / R T}$ corresponds to fraction of...

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Q JEE MAIN 2026

Consider the following reduction processes : $$ \begin{aligned} & \mathrm{Al}^{3+}+3 \mathrm{e}^{-} \longrightarrow \mathrm{Al}(\mathrm{~s}), \mathrm{E}^0=-1.66 \mathrm{~V} \\ & \mathrm{Fe}^{3+}+\mathrm{e}^{-} \longrightarrow \mathrm{Fe}^{2+},...

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Q JEE MAIN_2026_

The pH and conductance of a weak acid $(\mathrm{HX})$ was found to be 5 and $4 \times 10^{-5} \mathrm{~S}$, respectively....

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Q JEE MAIN 2020

The Gibbs energy change (in J ) for the given reaction at $[\mathrm{Cu} 2+]=[\mathrm{Sn} 2+]=1 \mathrm{M}$ and 298 K is:...

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Q JEE MAIN 2020

The statement that is not true about ozone is

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Q JEE MAIN 2020

For the disproportionation reaction $2 \mathrm{Cu}^{+}(\mathrm{ag}) \rightleftharpoons \mathrm{Cu}(\mathrm{s})+\mathrm{Cu}^{2+}(\mathrm{ag})$ at $298 \mathrm{~K} . \mathrm{In} \mathrm{K}$ (where K is the equilibrium constant)...

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Q JEE-MAIN 2019

The standard electrode potential $E^{\circ}$ and its temperature coefficient $\left(\frac{d E^{\circ}}{d T}\right)$ for a cell are $2 V$ and $...

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Q JEE MAIN_2019_

Consider the statements S1 and S2: S1: Conductivity always increases with decrease in the concentration of electrolyte. S2 : Molar...

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Q JEE-MAIN 2019

Water samples with BOD values of 4 ppm and 18 ppm, respectively, are

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Q JEE MAIN 2019

The standard Gibbs energy for the given cell reaction in kJ mol–1 at 298 K is $\mathrm{Zn}(\mathrm{s})+\mathrm{Cu}^{2+}(\mathrm{aq}) \longrightarrow \mathrm{Zn}^{2+}(\mathrm{aq})+\mathrm{Cu}(\mathrm{s})$, $...

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Q JEE MAIN 2019

The upper stratosphere consisting of the ozone layer protects us from the sun’s radiation that falls in the wavelength region...

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Q JEE MAIN 2020

Potassium chlorate is prepared by the electrolysis of KCl in basic solution. $$ 6 \mathrm{OH}^{-}+\mathrm{Cl}^{-} \rightarrow \mathrm{ClO}^{-}{ }_3+3 \mathrm{H}_2 \mathrm{O}+6...

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Q JEE MAIN 2019

$\wedge_{\mathrm{m}}^{\circ}$ for $\mathrm{NaCl}, \mathrm{HCl}$ and NaA are $126.4,425.9$ and $100.5 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$, respectively. If the conductivity of 0.001 M...

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Q JEE MAIN 2020

For the given cell; $$ \mathrm{Cu}(\mathrm{~s})\left|\mathrm{Cu}^{2+}\left(\mathrm{C}_1 \mathrm{M}\right) \| \mathrm{Cu}^{2+}\left(\mathrm{C}_2 \mathrm{M}\right)\right| \mathrm{Cu}(\mathrm{~s}) $$ change in Gibbs energy ( $\Delta \mathrm{G}$ )...

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Q JEE MAIN 2020

108 g of silver (molar mass $108 \mathrm{~g} \mathrm{~mol}^{-1}$ ) is deposited at cathode from $\mathrm{AgNO}_3(\mathrm{aq})$ solution by a certain...

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Q JEE MAIN 2019

For the cell $\mathrm{Zn}(\mathrm{s})\left|\mathrm{Zn}^{2+}(\mathrm{ag}) \| \mathrm{M}^{x+}(\mathrm{ag})\right| \mathrm{M}(\mathrm{s})$, different half cells and their standard electrode potentials are given below If $...

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Q JEE MAIN 2020

What would be the electrode potential for the given half cell reaction at $\mathrm{pH}=5$ ? $\_\_\_\_$ . $...

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Q JEE MAIN 2020

Among the gases (a) - (e), the gases that cause greenhouse effect are

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Q JEE-MAIN 2020

The variation of molar conductivity with concentration of an electrolyte (X) in aqueous solution is shown in the given figure....

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Q JEE MAIN 2019

For the reaction, $$ \begin{aligned} & 2 \mathrm{SO}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_3(\mathrm{~g}) \\ & \Delta \mathrm{H}=-57.2 \mathrm{~kJ} \mathrm{~mol}^{-1} \text { and...

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Q JEE MAIN 2019

Which one of the following graphs between molar conductivity ( $\Lambda_{\mathrm{m}}$ ) versus $\sqrt{\mathrm{C}}$ is correct?

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Q JEE MAIN 2020

Identify the incorrect statement from the option below for the above cell:

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Q JEE Main 2019

Consider the following reduction processes: $$ \begin{aligned} & \mathrm{Zn}^2++2 \mathrm{e}^{-} \rightarrow \mathrm{Zn}(\mathrm{~s}) ; \mathrm{E}^{\circ}=-0.76 \mathrm{~V} \\ & \mathrm{Ca}^{2+}+2 \mathrm{e}^{-} \rightarrow...

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Q JEE MAIN 2020

250 mL of a waste solution obtained from the workshop of a goldsmith contains $0.1 \mathrm{M} \mathrm{AgNO}_3$ and 0.1 M...

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Q JEE MAIN 2020

Biochemical Oxygen Demand (BOD) is the amount of oxygen required (in ppm)

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Q JEE MAIN 2020

Amongst the following, the form of water with the lowest ionic conductance at 298 K is

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Q JEE MAIN 2020

For an electrochemical cell, $\mathrm{Sn}(\mathrm{s})\left|\mathrm{Sn}^{2+}(\mathrm{aq}, 1 \mathrm{M}) \| \mathrm{Pb}^{2+}(\mathrm{aq}, 1 \mathrm{M})\right| \mathrm{Pb}(\mathrm{s})$ the ratio $\frac{\left[\mathrm{Sn}^{2+}\right]}{\left[\mathrm{Pb}^{2+}\right]}$ when this cell attains equilibrium...

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Q JEE-MAIN 2020

An acidic solution of dichromate is electrolyzed for 8 minutes using 2 A current. As per the following equation $...

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Q JEE-MAIN 2020

The incorrect statement(s) among (a) – (d) regarding acid rain is (are) (a) It can corrode water pipes. (b) It...

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Q JEE MAIN 2021

The resistance of a conductivity cell with cell constant $1.14 \mathrm{~cm}^{-1}$, containing 0.001 M KCl at 298 K is $...

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Q JEE MAIN 2019

A solution of $\mathrm{Ni}\left(\mathrm{NO}_3\right)_2$ is electrolysed between platinum electrodes using 0.1 Faraday electricity. How many mole of Ni will be...

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Q JEE-MAIN 2021

For the galvanic cell $$ \mathrm{Zn}(\mathrm{~s})+\mathrm{Cu}^{2+}(0.02 \mathrm{M}) \rightarrow \mathrm{Zn}^{2+}(0.04 \mathrm{M})+\mathrm{Cu}(\mathrm{~s}) $$ $\mathrm{E}_{\text {cell }}=$ $\_\_\_\_$ $\times 10^{-2} \mathrm{~V}$. (Nearest integer)...

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Q JEE MAIN 2020

Given that the standard potentials $\left(\mathrm{E}^{\circ}\right)$ of $\mathrm{Cu}^{2+} / \mathrm{Cu}$ and $\mathrm{Cu}^{+} / \mathrm{Cu}$ are 0.34 V and 0.522 V...

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Q JEE MAIN 2021

Match List-I with List-II

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Q JEE MAIN 2019

In the cell $\mathrm{Pt}(\mathrm{s})\left|\mathrm{H}_2(\mathrm{~g}, 1 \mathrm{bar})\right| \mathrm{HCl}(\mathrm{aq})|\mathrm{AgCl}(\mathrm{s})| \mathrm{Ag}(\mathrm{s}) \mid \mathrm{Pt}(\mathrm{s})$ the cell potential is 0.92 V when a $10^{-6}$ molal...

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Q JEE MAIN 2021

Given below are two statements: Statement 1: The limiting molar conductivity of KCl (strong electrolyte) is higher compared to that...

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Q JEE MAIN_2021_

For the cell $$ \mathrm{Cu}(\mathrm{~s})\left|\mathrm{Cu}^{2+}(\mathrm{aq})(0.1 \mathrm{M}) \| \mathrm{Ag}^{+}(\mathrm{aq})(0.01 \mathrm{M})\right| \mathrm{Ag}(\mathrm{~s}) $$ the cell potential $\mathrm{E}_1=0.3095 \mathrm{~V}$ For the cell $$...

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Q JEE MAIN 2021

If the conductivity of mercury at $0^{\circ} \mathrm{C}$ is $1.07 \times 10^6 \mathrm{~S} \mathrm{~m}^{-1}$ and the resistance of a cell...

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Q _JEE MAIN_2021_

Match List - I with List - II:

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Q JEE-MAIN 2021

If the conductivity of mercury at $0^{\circ} \mathrm{C}$ is $1.07 \times 10^6 \mathrm{~S} \mathrm{~m}^{-1}$ and the resistance of a cell...

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Q JEE MAIN 2021

Consider the following cell reaction : $\mathrm{Cd}_{(\mathrm{s})}+\mathrm{Hg}_2 \mathrm{SO}_{4(\mathrm{~s})}+\frac{9}{5} \mathrm{H}_2 \mathrm{O}_{(\mathrm{i})} \rightleftharpoons \mathrm{CdSO}_4 \cdot \frac{9}{5} \mathrm{H}_2 \mathrm{O}_{(\mathrm{s})}+2 \mathrm{Hg}_{(\mathrm{i})}$ The value of...

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Q JEE MAIN 2021

Water sample is called cleanest on the basis of which one of the BOD values given below

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Q JEE MAIN 2019

Given that $\mathrm{E}_{\mathrm{O}_2 / \mathrm{H}_2 \mathrm{O}}^{\ominus}=+1.23 \mathrm{~V}$; $$ \begin{aligned} & \mathrm{E}_{\mathrm{S}_2 \mathrm{O}_8^{2-} / \mathrm{SO}_4^{2-}}^{\odot}=2.05 \mathrm{~V} \\ & \mathrm{E}_{\mathrm{Br}_2 / \mathrm{Br}^{-}}^{\odot}=+1.09...

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Q JEE MAIN 2021

Assume a cell with the following reaction $\mathrm{Cu}_{(\mathrm{s})}+2 \mathrm{Ag}^{+}\left(1 \times 10^{-3} \mathrm{M}\right) \rightarrow \mathrm{Cu}^{2+}(0.250 \mathrm{M})+2 \mathrm{Ag}_{(\mathrm{s})}$ $\mathrm{E}_{\mathrm{cell}}^{\ominus}=2.97 \mathrm{~V}$ $...

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Q JEE MAIN 2021

Consider the cell at $25^{\circ} \mathrm{C} \mathrm{Zn}\left|\mathrm{Zn}^{2+}(\mathrm{aq}),(1 \mathrm{M}) \| \mathrm{Fe}^{3+}(\mathrm{aq}), \mathrm{Fe}^{2+}(\mathrm{aq})\right| \mathrm{Pt}(\mathrm{s})$ The fraction of total iron present as $\mathrm{Fe}^{3+}$...

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Q JEE MAIN 2021

Potassium chlorate is prepared by electrolysis of KCl in basic solution as shown by following equation. $...

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Q JEE MAIN 2021

The conductivity of a weak acid HA of concentration $0.001 \mathrm{~mol} \mathrm{~L}^{-1}$ is $2.0 \times 10^{-5} \mathrm{~S} \mathrm{~cm}^{-1}$. If $...

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Q JEE MAIN 2021

The product obtained from the electrolytic oxidation of acidified sulphate solutions, is :

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Q JEE-MAIN 2021

Consider the reaction $\mathrm{N}_2 \mathrm{O}_4(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}_2(\mathrm{~g})$. The temperature at which $\mathrm{KC}=20.4$ and $\mathrm{K}_{\mathrm{P}}=600.1$, is $\_\_\_\_$ K. (Round off...

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Q JEE-MAIN 2021

A KCl solution of conductivity $0.14 \mathrm{~S} \mathrm{~m}^{-1}$ shows a resistance of $4.19 \Omega$ in a conductivity cell. If the...

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Q JEE MAIN 2021

Which of the following statement(s) is (are) incorrect reason for eutrophication ? (A) excess usage of fertilisers (B) excess usage...

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Q JEE MAIN 2021

The molar conductivities at infinite dilution of barium chloride, sulphuric arid and hydrochloric acid are 280,860 and $426 \mathrm{Scm}^2 \mathrm{~mol}^{-1}$...

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Q JEE Main 2019

The anodic half-cell of lead-acid battery is recharged using electricity of 0.05 Faraday. The amount of $\mathrm{PbSO}_4$ electrolyzed in g...

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Q JEE MAIN 2021

A $5.0 \mathrm{~m} \mathrm{~mol} \mathrm{dm}^{-3}$ aqueous solution of KCl has a conductance of 0.55 mS when measured in a cell...

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Q JEE MAIN 2021

Given below are two statements :- Statement I : The value of the parameter "Biochemical Oxygen Demand (BOD)" is important...

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Q JEE MAIN 2021

For the reaction $2 \mathrm{Fe}^{3+}(\mathrm{aq})+2 \mathrm{I}^{-}(\mathrm{aq}) \rightarrow 2 \mathrm{Fe}^{2+}(\mathrm{aq})+\mathrm{I}_2(\mathrm{~s})$ the magnitude of the standard molar free energy change, $\Delta_{\mathrm{r}} \mathrm{G}_{\mathrm{m}}^0=-$...

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Q JEE MAIN 2021

Given below are two statements : Statement I : The pH of rain water is normally ~5.6. Statement II :...

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Q JEE MAIN 2021

Emf of the following cell at 298 K in V is $\mathrm{x} \times 10^{-2} . \mathrm{Zn}\left|\mathrm{Zn}^{2+}(0.1 \mathrm{M})\right|\left|\mathrm{Ag}^{+}(0.01 \mathrm{M})\right| \mathrm{Ag}$. The...

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Q JEE MAIN 2021

Compound A used as a strong oxidizing agent is amphoteric in nature. It is the part of lead storage batteries....

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Q JEE MAIN 2021

Given below are two statements : Statement I: The $\mathrm{E}^{\circ}$ value of $\mathrm{Ce}^{4+} / \mathrm{Ce}^{3+}$ is +1.74 V . Statement...

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Q JEE MAIN 2021

The gas released during anaerobic degradation of vegetation may lead to :

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Q JEE MAIN 2021

The presence of ozone in troposphere

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Q JEE MAIN 2022

Match List I with List II

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Q JEE MAIN 2022

In the titration of $\mathrm{KMnO}_4$ and oxalic acid in acidic medium, the change in oxidation number of carbon at the...

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Q JEE MAIN 2022

The conductivity of a solution of complex with formula $\mathrm{CoCl}_3\left(\mathrm{NH}_3\right)_4$ corresponds to $1: 1$ electrolyte, then the primary valency of...

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Q JEE MAIN 2022

The spin-only magnetic moment value of $\mathrm{M}^{3+}$ ion (in gaseous state) from the pair $\mathrm{Cr}^{3+} / \mathrm{Cr}^{2+}, \mathrm{Mn}^{3+} / \mathrm{Mn}^2$,...

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Q JEE MAIN 2022

Match List I with List II Choose the correct answer from the options given below:

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Q JEE MAIN 2022

For a cell, $\mathrm{Cu}(\mathrm{s}) \mid \mathrm{Cu}^{2+}\left(0.001 \mathrm{M}| | \mathrm{Ag}^{+}(0.01 \mathrm{M}) \mid \mathrm{Ag}(\mathrm{s})\right.$ the cell potential is found to be 0.43...

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Q JEE MAIN 2022

Match List I with List II

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The cell potential for $\mathrm{Zn}\left|\mathrm{Zn}^{2+}(a q) \| \mathrm{Sn}^{\mathrm{X}+}\right| \mathrm{Sn}$ is 0.801 V at 298 K . The reaction quotient for...

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Q JEE MAIN 2022

Resistance of a conductivity cell (cell constant $129 \mathrm{~m}^{-1}$ ) filled with 74.5 ppm solution of KCl is $100 \Omega$...

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Q JEE MAIN 2022

Given below are two statements : Statement I : In polluted water values of both dissolved oxygen and BOD are...

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Q JEE MAIN 2022

The molar conductivity of a conductivity cell filled with 10 moles of 20 mL NaCl solution is $\wedge_{\mathrm{m1}}$ and that...

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Q JEE MAIN 2022

The amount of charge in F (Faraday) required to obtain one mole of iron from $\mathrm{Fe}_3 \mathrm{O}_4$ is $\_\_\_\_$ ....

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Q JEE MAIN 2022

Given below are two statements: Statement I: For KI, molar conductivity increases steeply with dilution. Statement II: For carbonic acid,...

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Q JEE MAIN 2022

Match List–I with List–II. Choose the correct answer from the options given below :

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Q

The cell potential for the given cell at $298 \mathrm{~K} \mathrm{Pt}\left|\mathrm{H}_2(\mathrm{~g}, 1 \mathrm{bar})\right| \mathrm{H}^{+}(\mathrm{ag}) \| \mathrm{Cu}^{2+}(\mathrm{aq}) \mid \mathrm{Cu}(\mathrm{s})$ is 0.31...

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Q JEE MAIN 2022

For the given reactions $\mathrm{Sn}^{2+}+2 \mathrm{e}-\rightarrow \mathrm{Sn}$ $\mathrm{Sn}^{4+}+4 \mathrm{e}-\rightarrow \mathrm{Sn}$ The electrode potentials are; $\mathrm{E}_{\mathrm{Sn}^{2+} / \mathrm{Sn}}^{\circ}=-0.140 \mathrm{~V}$ and $...

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Q JEE MAIN 2022

For the reaction taking place in the cell: $$ \begin{aligned} & \mathrm{Pt}(\mathrm{~s})\left|\mathrm{H}_2(\mathrm{~g})\right| \mathrm{H}^{+}(\mathrm{aq}) \| \mathrm{Ag}^{+}(\mathrm{aq}) \mid \mathrm{Ag}(\mathrm{~s}) \\ & \mathrm{E}_{\text...

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Q JEE-Main 2022

The resistance of conductivity cell containing 0.01 M KCl solution at 298 K is $1750 \Omega$. If the conductivity of...

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Q JEE MAIN 2022

A solution of $\mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3$ is electrolyzed for ' x ' min with a current of 1.5 A to deposit 0.3482...

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Q JEE MAIN 2022

The correct order of reduction potentials of the following pairs is

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Q JEE MAIN 2022

Match List I with List II. Choose the correct answer from the options given below:

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Q JEE MAIN 2022

The quantity of electricity in Faraday needed to reduce 1 mol of $\mathrm{Cr}_2 \mathrm{O}_7^{2-}$ to $\mathrm{Cr}^{3+}$ is $\_\_\_\_$ .

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Q JEE MAIN 2022

The solubility product of a sparingly soluble salt $\mathrm{A}_2 \mathrm{X}_3$ is $1.1 \times 10^{-23}$. If specific conductance of the solution...

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Q JEE-Main 2022

The cell potential for the following cell $\mid$ $$ \mathrm{Pt}\left|\mathrm{H}_2(\mathrm{~g})\right| \mathrm{H}^{+}(\mathrm{ag})| | \mathrm{Cu}^{2+}(0.01 \mathrm{M}) \mid \mathrm{Cu}(\mathrm{~s}) $$ is 0.576 V...

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Q JEE MAIN 2022

A dilute solution of sulphuric acid is electrolyzed using a current of 0.10 A for 2 hours to produce hydrogen...

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Q JEE MAIN 2022

The limiting molar conductivities of $\mathrm{Nal}^{\circ} \mathrm{NaNO}_3$ and $\mathrm{AgNO}_3$ are $12.7,12.0$ and $13.3 \mathrm{mS} \mathrm{m}^2 \mathrm{~mol}^{-1}$, respectively (all at $...

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Q JEE MAIN 2022

In a cell, the following reactions take place $...

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Q JEE MAIN 2024

Consider the following redox reaction: $$ \mathrm{MnO}_4^{-}+\mathrm{H}^{+}+\mathrm{H}_2 \mathrm{C}_2 \mathrm{O}_4 \rightleftharpoons \mathrm{Mn}^{2+}+\mathrm{H}_2 \mathrm{O}+\mathrm{CO}_2 $$ The standard reduction potentials are given as...

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Q JEE MAIN 2024

For a certain reaction at $300 \mathrm{~K}, \mathrm{~K}=10$, then $\Delta \mathrm{G}^{\circ}$ for the same reaction is $\times 10^{-1} \mathrm{~kJ} \mathrm{~mol}^{-1}$....

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Q JEE MAIN 2024

The amount of electricity in Coulomb required for the oxidation of 1 mol of $\mathrm{H}_2 \mathrm{O}$ to $\mathrm{O}_2$ is $...

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Q JEE MAIN 2024

The values of conductivity of some materials at $298.15 \mathrm{~K}^{-1}$ in $\mathrm{Sm}^{-1}$ are $...

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Q JEE MAIN 2024

Reduction potential of ions are given below: The correct order of their oxidising power is:

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Q JEE MAIN 2024

A constant current was passed through a solution of $\mathrm{AuCl}_4^{-}$ion between gold electrodes. After a period 10.0 minutes, the increase...

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Q JEE MAIN 2024

The hydrogen electrode is dipped in a solution of $\mathrm{pH}=3$ at $25^{\circ} \mathrm{C}$. The potential of the electrode will be...

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Q JEE MAIN 2024

Which of the following statements is not correct about rusting of iron?

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Q JEE MAIN 2025

The molar conductance of an infinitely dilute solution of ammonium chloride was found to be $185 \mathrm{Scm}^2 \mathrm{~mol}^{-1}$ and the...

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Q JEE MAIN 2025

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Q JEE MAIN 2025

Match List - I with List - II. Choose the correct answer from the options given below :

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Q JEE MAIN 2025

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Q JEE-Main_2023

The resistivity of a 0.8 M solution of an electrolyte is $5 \times 10^{-3} \Omega \mathrm{~cm}$ . Its molar conductivity...

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Q JEE MAIN 2023

The number of incorrect statements from the following is ______

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Q JEE MAIN 2023

The number of correct statements from the following is: A. $\mathrm{E}_{\text {cell }}$ is an intensive parameter. B. A negative...

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Q JEE MAIN 2023

At 298 K , the standard reduction potential for $\mathrm{Cu}^{2+} / \mathrm{Cu}$ electrode is 0.34 V . Given: $...

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40 mL of a mixture of $\mathrm{CH}_3 \mathrm{COOH}$ and HCl (aqueous solution) is titrated against 0.1 M NaOH solution conductometrically....

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The standard cell potential ( $\mathrm{E}_{\text {cell }}^{\ominus}$ ) of a fuel cell based on the oxidation of methanol in...

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The standard reduction potential at 298 K for the following half cells are given below: $$ \mathrm{NO}_3^{-}+4 \mathrm{H}^{+}+3 \mathrm{e}^{-} \rightarrow...

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Q JEE MAIN 2023

https://competishun.com/the-product-which-is-not-obtained-during-the-electrolysis-of-brine-solution-is/

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$1 \times 10^{-5} \mathrm{M} \mathrm{AgNO}_3$ is added to 1 L of saturated solution of AgBr . The conductivity of this...

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The equilibrium constant for the reaction $\mathrm{Zn}(\mathrm{s})+\mathrm{Sn}^{2+}(\mathrm{aq}) \rightleftharpoons \mathrm{Zn}^{2+}(\mathrm{aq})+\mathrm{Sn}(\mathrm{s})$ is $1 \times 10^{20}$ at 298 K . The magnitude of...

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$\mathrm{Pt}(\mathrm{s}) \mathrm{H}_2(\mathrm{~g})(1 \mathrm{bar})\left|\mathrm{H}^{+}(\mathrm{aq})(1 \mathrm{M})\right|\left|\mathrm{M}^{3+}(\mathrm{aq}), \mathrm{M}^{+}(\mathrm{aq})\right| \mathrm{Pt}(\mathrm{s})$ $$ \text { The Ecell for the given cell is } 0.1115 \mathrm{~V} \text...

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The concentration of dissolved Oxygen in water for growth of fish should be more than ppm and Biochemical Oxygen Demand...

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Which one among the following metals is the weakest reducing agent ?

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Match List I with List II

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A. Ammonium salts produce haze in atmosphere. B. Ozone gets produced when atmospheric oxygen reacts with chlorine radicals. C. Polychlorinated...

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The total change in the oxidation state of manganese involved in the reaction of $\mathrm{KMnO}_4$ and potassium iodide in the...

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A metal surface of 100 cm2 area has to be coated with nickel layer of thickness 0.001 mm. A current...

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In an electrochemical reaction of lead, at standard temperature, if $\mathrm{E}_{\left(\mathrm{Pb}^{2+} / \mathrm{Pb}\right)}^0=\mathrm{m}$ Volt and $\mathrm{E}_{\left(\mathrm{Pb}^{4+} / \mathrm{Pb}\right)}^0=\mathrm{n}$ Volt, then...

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$\mathrm{FeO}_4^{2-} \xrightarrow{+2.2 \mathrm{~V}} \mathrm{Fe}^{3+} \xrightarrow{+0.70} \mathrm{Fe}^{2+} \xrightarrow{-0.45} \mathrm{Fe}^0$ $\mathrm{E}_{\mathrm{FeO}_4^{2-} / \mathrm{Fe}^{2+}}^\theta$ is $\mathrm{x} \times 10^{-3} \mathrm{~V}$ The value of x...

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The reaction Ea$y occurs in which of the given galvanic cell. $$ \frac{1}{2} \mathrm{H}_2(\mathrm{~g})+\mathrm{AgCl}(\mathrm{~s}) \rightleftharpoons \mathrm{H}^{+}(\mathrm{aq})+\mathrm{Cl}^{-}(\mathrm{aq})+\mathrm{Ag}(\mathrm{~s}) $$...

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Q JEE MAIN 2023

The standard electrode potential of M+/M in aqueous solution does not depend on

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The logarithm of equilibrium constant for the reaction $\mathrm{Pd}^{2+}+4 \mathrm{Cl} \rightleftharpoons \mathrm{PdCl}_4^{2-}$ is $\_\_\_\_$ (Nearest integer) Given: $...

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At what pH, given half cell $\mathrm{MnO}_4^{-}(0.1 \mathrm{M}) \mid \mathrm{Mn}^{2+}(0.001 \mathrm{M})$ will have electrode potential of 1.282 V? _______ (Nearest...

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Consider the cell $$ \mathrm{Pt}_{(\mathrm{s})}\left|\mathrm{H}_2(\mathrm{~g}, 1 \mathrm{~atm})\right| \mathrm{H}^{+}(\mathrm{aq}, 1 \mathrm{M})| | \mathrm{Fe}^{3+}(\mathrm{aq}), \mathrm{Fe}^{2+}(\mathrm{aq}) \mid \mathrm{Pt}(\mathrm{~s}) $$ When the potential of...

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Consider the cell $ \operatorname{Pt}(\mathrm{s})|\mathrm{H}(\mathrm{~s})(1 \mathrm{~atm})| \mathrm{H}^{+}\left(\mathrm{aq},\left[\mathrm{H}^{+}\right]=1\right) \| \mathrm{Fe}^{3+}(\mathrm{aq}), \mathrm{Fe}^{2+}(\mathrm{aq}) \mid \operatorname{Pt}(\mathrm{s}) $ Given: $\mathrm{E}_{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}^{\infty}=0.771 \mathrm{~V}$ and $...

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Q JEE MAIN 2023

Following figure shows dependence of molar conductance of two electrolytes on concentration. is the limiting molar conductivity.

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At 298 K, a 1 litre solution containing 10 mmol of $\mathrm{Cr}_2 \mathrm{O}_7^{2-}$ and 100 mmol of $\mathrm{Cr}^{3+}$ shows a...

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The standard electrode potential (M3+/M2+) for V, Cr, Mn and Co are –0.26 V, –0.41 V, +1.57 V and +1.97...

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Two isolated metallic solid spheres of radii $R$ and $2 R$ are charged such that both have same charge density...

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Q JEE MAIN 2024

The potential for the given half cell at 298" " K is (-)………...×〖10〗^(-2) " " V. 2H^+ _"aq) " +2e^-→H_2...

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Q JEE MAIN 2024

The standard reduction potentials at 298" " K for the following half cells are given below : ■(&Cr_2 O_7^(2-)+14H^++6e^-→2Cr^(3+)+7H_2 O,E^∘=1.33"...

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The molar conductivity for electrolytes A and B are plotted against $C^{1 / 2}$) as shown below. Electrolytes A and...

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Molar ionic conductivities of divalent cation and anion are 57" " S〖" " cm〗^2 〖" " mol〗^(-1) and 73" "...

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A conductivity cell with two electrodes (dark side) are half filled with infinitely dilute aqueous solution of a weak electrolyte....

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One of the commonly used electrode is calomel electrode. Under which of the following categories calomel electrode comes?

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Identify the factor from the following that does not affect electrolytic conductance of a solution.

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The reaction at cathode in the cells commonly used in clocks involves.

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One Faraday of electricity liberates $x \times 10^{-1}$ gram atom of copper from copper sulphate, x is _____ .

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What pressure (bar) of H_2 would be required to make emf of hydrogen electrode zero in pure water at 25^∘...

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The mass of zinc produced by the electrolysis of zinc sulphate solution with a steady current of 0.015 A for...

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The metals that are employed in the battery industries are A. Fe B. Mn C. Ni D. Cr E. Cd...

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$0.2 \%(\mathrm{w} / \mathrm{v})$ solution of NaOH is measured to have resistivity $870.0 \mathrm{~m} \Omega \mathrm{~m}$. The molar conductivity of...

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Q JEE MAIN 2025

Match List - I with List - II : Choose the correct answer from the options given below :

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$\mathrm{O}_{2}$ gas will be evolved as a product of electrolysis of :[0pt] (A) an aqueous solution of $\mathrm{AgNO}_{3}$ using silver...

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1 Faraday electricity was passed through ${\rm{C}}{{\rm{u}}^{2 + }}(1.5{\rm{M}},1\;{\rm{L}})/{\rm{Cu}}$ and 0.1 Faraday was passed through ${\rm{A}}{{\rm{g}}^ + }(0.2{\rm{M}},1\;{\rm{L}})/{\rm{Ag}}$ electrolytic cells....

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Given below are two statements: Statement I: Mohr's salt is composed of only three types of ions-ferrous, ammonium and sulfate....

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On charging the lead storage battery, the oxidation state of lead changes from ${x_1}$ to ${y_1}$ at the anode and...

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Electrolysis of 600 mL aqueous solution of NaCl for 5 min changes the pH of the solution to 12 ....

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Correct order of limiting molar conductivity for cations in water at 298 K is :

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Based on the data given below : / \mathrm{Cl}^{(-)}}^{\circ}=1.36 \mathrm{~V} \mathrm{E}_{\mathrm{MnO}_{4}^{-} / \mathrm{Mn}^{2+}}^{\circ}=1.51 \mathrm{~V} & \mathrm{E}_{\mathrm{Cr}^{3+} / \mathrm{Cr}}^{\circ}=-0.74 \mathrm{~V} \end{array}...

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Consider the following electrochemical cell at standard condition. $Au(s)\left| {Q{H_2},Q} \right|N{H_4}X(0.01M)||A{g^ + }(1M)\mid Ag(s){E_{{\rm{cell }}}} = + 0.4V$ The couple...

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Standard electrode potentials for a few half cells are mentioned below : $\mathrm{E}_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{\circ}=0.34 \mathrm{~V}, \mathrm{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{\circ}=-0.76 \mathrm{~V}$...

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Q JEE MAIN 2025

The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest...

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The molar conductivity of a weak electrolyte when plotted against the square root of its concentration, which of the following...

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For a ${\rm{Mg}}\left| {{\rm{M}}{{\rm{g}}^{2 + }}({\rm{aq}})} \right|\left| {{\rm{A}}{{\rm{g}}^ + }({\rm{aq}})} \right|{\rm{Ag}}$ the correct Nernst Equation is :

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Q JEE MAIN 2025

Given below is the plot of the molar conductivity vs $\sqrt {{\rm{ concentration }}}$ for KCl in aqueous solution.

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For the given cell $...

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$\text{FeO}_{4}^{{2-}}\xrightarrow{{+2.0~\text{V}}}\text{F}{{\text{e}}^{{3+}}}\xrightarrow{{0.8~\text{V}}}\text{F}{{\text{e}}^{{2+}}}\xrightarrow{{-0.5~\text{V}}}\text{F}{{\text{e}}^{0}}$ In the above diagram, the standard electrode potentials are given in volts (over the arrow). The value of ${{\text{E}}_{{\text{FeO}_{4}^{{2-}}/\text{F}{{\text{e}}^{{2+}}}}}}$...

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Q JEE MAIN 2025

Which of the following electrolyte can be used to obtain ${{\rm{H}}_2}\;{{\rm{S}}_2}{{\rm{O}}_8}$ by the process of electrolysis?

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A solution of aluminium chloride is electrolysed for 30 minutes using a current of 2 A . The amount of...

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Given below are two statements : Statement (I): Corrosion is an electrochemical phenomenon in which pure metal acts as an...

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